I just found out about the new Dozier Design "Phat Bob" slip joint, and new D2 Coppersmiths. I've never seen copper bolsters on a pocket knife, I wonder how they'd hold up over time.
http://www.kabar.com/knives/detail/181
http://www.kabar.com/knives/detail/174
http://www.kabar.com/knives/detail/181
http://www.kabar.com/knives/detail/174